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Google’s Tensor Processing Unit (TPU) — a chip custom-built for its machine learning framework, TensorFlow — is heading to edge devices. Today at the Cloud Next conference in San Francisco, the Mountain View company announced Edge TPU, an architecture tailor-made for industrial manufacturing and internet of things devices.

Edge TPUs aren’t quite like the chips that accelerate algorithms in Google’s data centers — those TPUs, the third generation of which the company announced at its I/O Developer conference in May, are liquid-cooled and designed to slot into server racks. They’ve been used internally to power products like Google Photos, Google Cloud Vision API calls, and Google Search results.

By contrast, Edge TPUs, which measure about a fourth of a penny in size, run calculations offline and locally, supplementing traditional microcontrollers and sensors. And they don’t train machine learning models — instead, they run inference (prediction) with a lightweight, low-overhead version of TensorFlow that’s more power efficient than the full-stack framework.

Google Edge TPU

Above: Google’s Edge TPU are tiny.

Image Credit: Google

That said, both TPUs are cut from the same cloth — they’re application-specific integrated circuits (ASICs), programmable chips optimized for specific workloads. That makes them highly efficient at performing tasks like training machine learning models from datasets (in the Cloud TPU’s case) and executing those models on-device (the Edge TPU’s function).


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Edge TPUs will be made available in October in a modular reference board consisting of an Edge TPU, an NXP chip, and a Wi-Fi module. Google said it has partnered with manufacturers like Arm, Harting, Hitachi Vantara, Nexcom, Nokia, and NXP to bring the kits to market.

One of the first partners to deploy the Edge TPUs is LG, which has used them inside inspection devices on production lines. The chips, which help to examine more than 200 images of glass per second during the production of LCD television panels, deliver 99.9 percent accuracy, Shingyoon Hyun, chief technology officer at LG’s CNS group, told CNBC.

In addition to Edge TPUs, Google announced a host of new G Suite and Google Cloud features, including an AI-powered grammar tool, enhanced documents search, a FIDO key, and new AutoML services.

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